GE GL317D Instruction Manual page 35

Presentation
Introduction
Principle
Symbols
In this module
07- 2016
Description and operation
SF gas monitoring
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The circuit- breaker uses pressurized SF
The SF gas pressure monitoring is essential to assure the circuit- breaker
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performances.
There is two SF gas pressure monitoring types :
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D Permanent monitoring with the help of a threshold densimeter.
D Periodic monitoring with the help of a dial densimeter (visual control)
IEC symbols for the apparatus technical characteristics.
Symbol
p Filling rated pressure for the insulation
re
p Alarm pressure for the insulation
ae
p Minimal pressure for the insulation
me
This module contains the following topics :
Gas pressure and density
Pressure measurement
Measuring density
Densimeter
GE Information
gas as electric arc quenching gas.
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Designation
Topic Page
2
3
4
5
L20- 001EN/08
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